South Africa's win over Samoa means that Fiji need to record a hugely unlikely 62-point win over Wales to deny them a place in the quarter-finals.
Wales have made seven changes to their line-up, with George North, Rhys Priestland, Jamie Roberts, Mike Phillips, Huw Bennett, Adam Jones and Luke Charteris all coming into the side following the 81-7 over Namibia.
Jonathan Davies, Alun-Wyn Jones and Stephen Jones are among those named on the bench, with Shane Williams not risked due to a thigh strain.
Fiji have made wholesale changes to their squad for the clash in Hamilton.
With the Flying Fijians unable to make it through to the knockout stages, they have made 10 changes of personnel and two positional switches following the disappointing loss to Samoa.
Iliesa Keresoni, Albert Vulivuli, Ravai Susau Fatiaki, Michael Tagicakibau, Vitori Buatava, Sakiusa Matadigo, Rupeni Nasiga, Wame Lewaravu, Setefano Somoca and Waisea Nailago all come into the line-up, with Gaby Lovobalavu moving to inside centre and Netani Talei named at No.8.
Talei will also take over the captaincy with Deacon Manu joining Kini Murimurivalu, Napolioni Nalaga, Sisa Koyamaibole and Seko Kalou in dropping out of the squad.
Vereniki Goneva, Seremaia Bai, Nemia Kenatale, Mala Ravulo and Campese Ma'afu are named on the bench, though, with Viliame Veikoso also included among the replacements.
Wales: 15 Lee Byrne, 14 George North, 13 Scott Williams, 12 Jamie Roberts, 11 Leigh Halfpenny, 10 Rhys Priestland, 9 Mike Phillips, 8 Toby Faletau, 7 Sam Warburton (c), 6 Ryan Jones, 5 Luke Charteris, 4 Bradley Davies, 3 Adam Jones, 2 Huw Bennett, 1 Gethin Jenkins. Replacements: 16 Lloyd Burns, 17 Paul James, 18 Alun Wyn Jones, 19 Andy Powell, 20 Lloyd Williams, 21 Stephen Jones, 22 Jonathan Davies
Fiji: 15 Iliesa Lomani Rakuka Keresoni, 14 Albert James Vulivuli, 13 Ravai Susau Fatiaki, 12 Gaby Lovobalavu, 11 Michael Tagicakibau, 10 Nicky Little, 9 Vitori Tomu Buatava, 8 Netani Edward Talei (c), 7 Sakiusa Matadigo, 6 Rupeni Nasiga, 5 Wame Lewaravu, 4 Leone Nakarawa, 3 Setefano Somoca, 2 Sunia Koto, 1 Waisea Nailago. Replacements: 16 Viliame Veikoso, 17 Campese Ma'afu, 18 Akapusi Qera, 19 Mala Ravulo, 20 Nemia Kenatale, 21 Seremaia Bai, 22 Vereniki Goneva.
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